This assessment report presents the results of the Non-Identification (Non-ID) Processing operation conducted during the 2020 Census. A non-ID respondent was a person who provided responses to the questionnaire by either Internet Self-Response (ISR) or an interview with a Census Questionnaire Assistance (CQA) customer service representative (CSR) without a preassigned census identification number (Census ID). Respondents typically received Census IDs from 2020 Census mailings or from 2020 Census questionnaires dropped off at houses in non-mailable areas. Non-ID respondents provided location address information that helped the Census Bureau to match their address to the decennial census living quarters address inventory.

The main goal of Non-ID Processing was to resolve records without a Census ID. “Resolved” means no further processing was required during either the automated or clerical processing phases. The scope of Non-ID Processing for the 2020 Census included automated and clerical address matching and geocoding (assigning a spatial location) of non-ID cases. For the 2020 Census there were about 17,590,000 non-ID responses received for analysis. This was approximately 12 percent of the total number of living quarters enumerated in the 2020 Census.